Multiple spraying device



u y 1945- A. H. DOWNS MULTIPLE SPRAYING DEVIQE 2 sheets sheet 1 Filed June v 17, I939 INVENTOR v ATTORNEYS July 31, 1945. A. H. DOWNS 2,380,827

MULTIPLE SPRAYING DEVICE Filed June 1'7, 1959 2 Sheets-Sheet 2 5 l I i 7 2 ,9 I I ,2 0 29 2 V I5 9 HA 1\ m. \x ..J

lNVENTOR ATTORNEYS Patented July 31, 1945 Austin 1]. Downs, Glen Bilge, N. 1.,

mesne assignments, to Boy I. Alder,

phia, Pa.

asslgnor. by

Philadel- Applieation June 17, 1988, Serial No. 279,813

10 Claims.

This invention relates to improvements in devices for spraying lacquers, varnishes, paints and more particularly to a device for spraying a mixture of coating materials.

A principal object of the invention is the provision of a trigger controlled pressure operated device which is self cleaning in that coating or spraying materials remaining on the nozzle after spraying has been stopped is automatically removed therefrom alter the control trigger has been released by the operator.

A further object is the provision of such a device which is highly emcient in operation, simpie and easily controlled to use a minimum amount'of material and a minimum amount of air or gas pressure to accomplish the best atom-.

ising and sell. cleaning results.

Stillanother object is the provision of a novel control system for the control of the atomizing gas pressure whereby gas, free of the spraying materials will continue to flow momentarily subsequent to the spray cut-off and to blow residual spray from the nomles oi the device. I

Yet another obiect is the provision of a device whereby .iiilerent spraying materials may be individually supplied to separate spraying nossles and mixed externally of the spraying device on or Just prior to being deposited on a surface.

A further object is the provision of means to individually control the quantity of sprayi g or coating fluid fed to each norzle whereby the relative percentages of spraying materials may be regulated to meet particular needs.

l'urther objects include improvements in details of construction and are hereinafter set forth in full.

To the accomplishment of the foregoing and such other obiects as may hereinafter appear.

the invention consists in-the novel construction,

combination and arrangement oi elements hereinafter described and then sought tobe defined-in the appended claims, reference being had to the accompanying drawings forming a part hereof and which show; merely for the purpose '0! illustrative disclosure. preferred embodiments of my invention. it being expressly understood, however. that various changes may home in practice within the scope of the claims without digreasing from the inventiveidea. In the accompanying drawings, in which similar reference characters denote corresponding parts:

Fig. i represents a perspective view of the novel spraying gun and associated control apparatus;

Fig. 2 is an enlarged vertical section illustrating in detail the automatic control mechanism for cutting of! the su ply of spray materials prior to the out of! of air or gas ilow and for regulating the supply of spraying fluids individually; the line 2-2 of Fig. 1 lies in the plane oi section which passes vertically and centrally through the cylinder 00 and through both material valves ii and 12 in the block 43, and the section is viewed in the direction oi the arrows;

Fig. 3 is an eed vertical section tsiren along line 8-4 of Fig. 2 and viewed in the direction of the arrows illustrating in detail the control mechanism for regulating the quantity of spraying material. supplied to the spraying deon Fig. 4 is an enlarged horizontal section of the spraying device or gun illustrating the air or gas distributing system therein; the line 4-4 of Fig. 1 lies on the plane of section which passes approximately centrally through the axis of the gun barrel and throughboth nozzles, and the section is viewed in the direction of the arrows;

Fig. 6 is a partial front elevation taken substantlally along line H of Fig. 4 and viewed in the direction of the arrows;

Fig. 8 is a partial front elevation of a modified spraying device taken substantially along line 8-. of Fig. l, and viewed in the direction of the arrows; and

Fig. '1 is a partially sectionalised top Plan view of the modified spraying device illustrated in Fig. 8

1, 4 and 5, the numeral I designates the body of I a spraying device as a whole, this body including a barrel portion 2 and the handle portion 3, the handle portion extending downwardly from the barrel portion and inclined slightly to the rear so that the device has somewhat the appearance of an automatic revolver. The forward end of the device is provided with two outlet nozzles I and I arranged on a nozzle head i to slant toward each other so that the sprays elected therefrom will converge and mix intimately at 'a focal point in front thereof.

Devices of this kind are employed to spray material principally, for example, in the manufacture of mirrors. one of the nozzles serving to spray silver nitrate solution and the other to spray a reagent to secure the silver nitrate coatin to the back of a mirror. Other spraying materials may be used. The material for each nozzle is fed to the point of atomization by gravity. syphon or under pressure and consequently this device has Referring now to the drawings and iirst Figs. I

ports, passages and valves for controlling the admission and passage of the pressure fluid as well as the spraying liquids and the atomization of the same. A connection 'I to a suitable source of air or other fluid under pressure is made to the externally threaded nipple 8 on the lower end of the handle portion 3. Usually this pressure is automatically maintained by suitable regulating means as is well understood. This nipple 8 leads to a passage 9 which extends upwardly through the interior of the handle to the air inlet valve chamber III in the barrel portion of the device (Fig. 4). This valve chamber is provided with a valve seat II at the head of an air distributing chamber I2.

Slidably mounted in the barrel is a valve plunger I3 provided with a valve I4 in the valve chamber In which when resting on the valve seat II serves to cut off the pressure fluid from the source. A suitable spring I! surrounding the valve coupling nuts 41 and 48. These nuts are plunger behind the valve I4 serves to force the I valve on its said seat. The forward end of plunger I3 extends through the distributing chamber I2 andra suitable bearing opening in the wall of the barrel into a trigger recess or open slot I6. Therein a trigger I8 is pivotally supported from the barrel and the rear bearing face I8 thereof abuts the said plunger so that when the trigger is operated, the plunger 33 and consequently its valve I4 is moved away from its valve seat and permits fluid under pressure to enter the distributing chamber I2.

Barrel 2 is provided with two air passageways I1 and I8 which communicate with the distributing chamber through passageways I9 and 2D. The nozzle head 8 which extends perpendicular to the barrel axis and is secured to the barrel by suitable set screws 2| or the like, has two passageways 23 and 24 which register respectively with the forward open ends of passageways I1 and I8. Passageways 23 and 24 communicate respectively with the upwardly extending passageways 25 and 26 and the latter in turn communicate respectively with the oppositely extending passageways 21 and 28. The'latter communicate respectively with passageways 29 and 30 which lead to the atomizing chambers (not shown) of the nozzles 5 and 5'. These nozzles may be of any suitable type.

Below each nozzle 5 and 5', the nozzle head 6 is provided with the respective downwardly extending noses 3| and 32. These noses at their lower ends are provided respectively with the ,ex-

-ternal1y threaded nipples and 34 to which the which terminate respectively in the enlarged forwardly extending passageways 39 and 40 in the respective nozzles 5 and 5'. The latter passageways communicate with the atomizing chamber 4 bored centrally at 4! and threaded to receive the respective needle valves II and 52 whose inner ends are pointed at I3 and 84 to close of! the passageways El and 58 in the valve block 43 at the upper ends of bores 45 and 4'. Suitable manipu lating knobs 51 and 50 at the outer ends oi. the

valves ii and i2 facilitate the adjustment thereof and the variable restriction of the size of the opening into passageways 5i and. It for a purpose hereinafter to be described. Suitable packings Ila surrounding the needle valves in enlarged portions 50 of the bores 48 are pressed into sealing relationship by the clamping nuts 58 and prevent leakage of liquid around the needle valves.

Nipples 4| and 42 communicate with the respective bores 45 and 46 through the respective passageways (Figs. 1 and 3).

The valve block 43 is also provided with the vertically extending bores SI and 62 whose lower ends communicate respectively with the passageways 55 and 58 leadin to the bores 45 and 48. The upper ends of bores 8| and 62 are internal- 1y threaded at 63 and 64 to receive and threadedly engage respectively the plunger valve supporting nuts and ii. The latter are each bored internally at 61 to receive slidably the respective slide valve rods 69 and I0. These rods at their lower inner ends are provided with enlarged heads 'II and I2 and each head is bored at its bottom 13 to receive a cushion-like valve 15 of soft rubber or the like which is adapted to seat over the top ends of the respective passageways 55 and 58. Each valve rod is surrounded in enlarged portion 68 of the bore 61 with packing material 11, This material is clamped by respective clamping nuts 19 and 80 to permit leak proof reciprocal motion of the valve rods 09 and II.

The upper ends ti and 82 of the valve rods are externally threaded to receive the double pairs of nuts 88, 84. A yoke or cross bar US is suitably perforated at opposite ends to receive the ends of the rods. This yoke is clamped on each rod between the pairs of nuts It, l4 and serves, when moved, to move said valve rods as a unit.

Automatic movement of the yoke 85 is effected as follows:

An upwardly extending piston rod 86 is suitably attached to the yoke It by the nuts 81, This I rod extends through a bore 88 in a cylinder bracket 89 into a cylinder chamber 80. chamber 90 is formed by providing a countersunl: enlarged bore Si in the upper face of the cylinder bracket 89 whose internal edge is threaded at 92 to engage a cylindrical hollow casing 93 threaded externally at 94 to engage said threaded edge 82. The upper end of the casing is also externally threaded to receive the cover or cap 95. Suitable packing 96 and a packing nut 91 permit leak-proof sliding motion of the piston rod.

An attaching nut I00 is attached to the threaded upper end of piston rod It. This nut has an annular shoulder at III intermediate its ends, is threaded externally below said shoulder at "2 and has an upwardly extending annular flange I 03 above said shoulder which defines a cylindrical space I04 for a purpose tobe presently described. A backing washer I05 is adapted to be fitted over the threaded portion I02 and to abut the shoulder III. A piston washer I" of leather or other suitable soft material is also carried on 75 said threaded portion I02 below the backing tip end II I bottom of said space I04 A suitable strong coil spring IIO concentrically I arranged about flange I03 and extending between the lower face of cap 36 and the upper face of washer I06 tends to urge the piston assembly comprising said two washers I43, I06 downwardly and as a result through piston rod 66 and yoke 86 tends to maintain the valves I6 closed on their seats above the respective passageways 55 and 56.

Upward movement of the piston assembly is limited variably by adjustable stop mechanism. In the present embodiment this comprises an ex ternally threaded rod III which is adapted to screw into a threaded bore 35' in the cap 35. The lower end of rod III is provided with a nose or tip II2 which projects into the cylindrical space I04. The adjusted distance between the 3 and the face of the nut I00 at the determines the height to which the piston assembly may be raised in the cylinder 30. A lock 'nut II4 serves to lock the rod III in any adjusted position. A suitable manipulating knob H5 at the upper endof said rod III facilitates adjustment thereof.

Cylinder bracket 63 is provided with a nipple I20 suitably formed or attached thereto. This nipple connects with passageways I2I and I22 and the latter leads into the cylinder space 30.

Air or gas under pressure is supplied to the cylinder space 30 below the piston assembly from a gas reservoir I30 by a hose or pipe connection I3I attached to nipple I20 and to the outlet nipple I32 from said reservoir, said nipple communicating through a suitable passageway (not shown) with the chamber of said reservoir. An inlet nipple I33 also communicating with the chamber of said reservoir is connected to one end of a flexiblehose or pipe I36. The other end of said hose is attached to a nipple I31 (Figs. 1 and 4) provided .on the barrel 2 of the spraying device. This nipple communicates through a passageway I33 with a passageway I! in said barrel. Thus some of the air or fluid under pressure flowing in passageway I'I when the trigger I6 is pressed will be diverted and led to the reservoir to build up a pressure therein sufficient to overcome the spring H0 in the cylinder chamber 90 for a purpose to be presently described. A suitable adjustable pressure relief valve I40 of any well known type is provided for the air reservoir'to serve both as a safety valve and as a means of pressure regulation to compensate for variation in the strength of spring IIO.

Spraying materials A and B respectively are supplied to the bores 6| and 62 from storage sources (not shown) located well above the height of the spraying device I in its normal position of use.

-These the valve block 43 by the flexible hoses or pipes III and I52. Each nipple leads to one of the bores 6| or 62 through a passageway I53. Thus.

in the embodiment shown, material A is fed by sources are connected to nipples I60 on omizing chamber of nozzle 5. At the same'time,

opening of valve 15 in bore 62 permits material A-to flow through passageway 56 into bore 46 and thence through tube or pipe 35 to the atomizing chamber of nozzle 6'. The feed of each material to the respective nozzles 5 and 5' is essentially a gravity feed controlled by the valves I5 and limited, as to quantity, needle valves 63 and 54.

For convenience, the valve block 43 and cylinderbracket 33 are rigidly interconnected by a connecting member I60 which latter has attached thereto a clamping or friction ring I I. This ring is adjust-ably carried on a support g rod I62 extending vertically from a base I63? Likewise the reservoir- I30, in the embodiment shown, is connected to and supported by the cylinder bracket 33.

In operation, the nozzles 5 and 5 of the spraying device are pointed at the work to be sprayed. The trigger I6 is pressed, opening valve I4 and permitting air or gas under pressure from the distributing chamber I2 to reach the atomizing chambers of the nozzles 6 and 5 through the respective sets of air passageways I9, I1, 23, 25, 21, 23 and 20, I6, 24, 26, 23, 30. At the same time some of th air from passageway I1 is diverted into passageway I38 and passes from there through nipple I31 and hose or pipe I36 to the reservoir I30 building up a pressure therein of suflicient magnitude to force air through nipple I32, tube I3I, nipple I20 and passageways I22 and I2I into the cylinder chamber and to move the piston assembly I05, I06 therein upwardlyv against the spring IIO. Such movement automatically moves piston rod 86 and in consequence valve rods 63 and I0 upwardly, and moves valves I5 off their seats over passageways 55 and 56. This permits the needle valve controlled quantities of spraying materials to flow through tubes or hoses 35 and 36 to the spraying device and to reach the atomizing chambers of nozzles 5 and 5' through the respective sets of passageways 31, 33 and 33, 40. Spraying materials A and B are thoroughly atomized in the respective atomizing chambers of the respectiv nozzles 5 and 5 in "well known manner and ejected as fine sprays which converge from the respective nozzles and become intimately mixed on or just before being deposited on the surface being sprayed.

When spraying is completed the trigger I6 is released. This closes'the valve I4 and cuts off the main source of air supply from tube or hose 1. Air or gas in the reservoir I30 now-begins to flow in reverse direction through the tube or hose I36 to passageways I33 and H, from whence a portion of it flows directly to nozzle 5 and the balance flows through passageway I9 to distributing chamber I2, and passageway 20 to passageway I3 and thence to nozzle 5'.

As the pressure in the air reservoir recedes, the spring IIO overcomes the reduced pressure in cylinder space 90 and moves the piston and valve rod 36 downwardly closing the valves IS-and cutting off the spraying material supply. This cutoff occurs prior to reduction of the pressure in reservoir I30 to atmospheric level.' "Theresidual superatmospheric pressure in said reservoir after material cut-off continues'momentaril toiblow by the respective before they have a chance to solidify and thus makes the spraying device self-cleaning;

It is to be noted that needle valves 53 and 54 are individually adjustable. Thus it is possible to individually regulate the respective quantities of spraying materials A and B and to make one any desired percentage of the other.

In Figs. 6 and 7 a modified form of spraying device is shown in which the percenta e flow of spraying fluid to each nozzle may be individually controlled by structure directly embodied in the spraying device. Therein 201 designates the body of a spraying device as a whole, this body in cluding a barrel portion 202 and a handle portion, the handle portion extending downwardly in the same manner as the handle portion 3 of Fig. 1. The forward end of the device is provided with two outlet nozzles 205, 205' arranged on a nozzle head 206 to slant toward each other so that the sprays ejected therefrom will converge and mix intimately at a focal point in front thereof.

Air or gas under pressure is led to the passageways 211 and 218 in the same manner as that shown in Fig. 4 and controlled by a trigger 216' operating a valve like valve 14 in the same manner as trigger l6 operates valve I4 ofFig. 4. Air or gas from the respective passageways 211 and H8 is led to the atomizing chambers (not shown) of the nozzles 205 and 205' through the respective sets of passageways 223, 225, 221, 229 and 224, 226, 228, 230 arranged in the same manner in the nozzle head 206 as the corresponding passageways 23, 25, 21, 29 and 24, 26, 28, 30 inthe device of Fig. 4.

Below each nozzle 205 and 205', the nozzle head 206 is provided with the respective downwardly extending noses 231 and 232. These noses are internally bored to provide passageways 231' and 232' and threaded to receive respectively the nipples 232 and 233, to which in turn the flexible tubes or hoses 235 and 236 are suitably attached.

Each passageway 231' and 232' leads to a horizontally disposed bore 231 in the nozzle head 206, one adjacent and behind each of said nozzles 205, 205'. Each bore is internally threaded for its entire length and has a valve seat nut 238 screwed into it and lying at its inner end. This nut has a central-bore 239 countersunk at its ends 239' and 239 with the end 239 serving as a valve seat. A combination needle valve and closure valve device adapted to vary adjustably the size of passageway 239 and to serve as a cut-off i rovided for each nut 238. These combination valve devices each comprise a valve rod 240 provided at its inner end with a reduced diametered needle valve 241. Adjacent said needle valve on a reduced portion 242 of each rod, a flat valve 243 is mounted. This flat valve has an inset 244 of soft material, suchas rubber. or the like so admeasured in diameter as to close the countersunk portion 239 of the passageway 233 when it rests on the valve seat thereof. Each valve rod 240 extends through a bearing surface 245 of a supporting nut 246 screwed into each of the bores 231. Suitable packing material 241 arranged in an enlarged portion 248 of each of the bearing surfaces 245 and clamped into position by clamping nuts 249 serves to permit leak-proof reciprocal sliding motion of the valve rods 240.

The valve rods 240 extend rearwardly from the clamping nuts 249 and are each provided with a pair of spaced abutments or collar members 250 which have their opposite inner faces curved at 25L.

A yoke member 252 having tines 253 at its 01)- posite ends extends between the valve rods and the tines engage between the respective pairs of abutments 250. The side edges 253 of the tines are likewise curved to permit rotation of the yoke member relative to the valve rods. The yoke member has a rearwardly projecting centrally located flange 254. This flange at its rear end has a slot 255 into which a portion of the trigger 2 I6 extends. The flange has laterallyoppositely projecting noses 251 which engage the trigger so that movement of the latter causes corresponding movement of the yoke member 252.-

A pair of oppositely extending flanges 280 on the barrel 202 project beyond the axes of the respective valve rods 240. Each flange is provided with an adjusting screw 26! and lock nut 262. These screws are arranged in axial alignment with the respective valve rods and permit individual adjustment of each valve rod 240 and consequently the needle valves 2 at their inner ends. Since abutments 250 and the tines 253 have curved edges, the yoke member 252 is capable of rotation in conformity with the relative adjustment of the individual valve rods.

In operation hoses 235 and 236 are connectezl to sources of materials A and B located well above the positions of use of the device. When the trigger 216' is squeezed air valve 2 is opened admitting air or gas under pressure through the various sets of passageways described to the atomizing chamber of each nozzle 205 and 205'. Simultaneously the trigger moves the yoke member 252 rearwardly causing the fiat valves 243 to be lifted off their respective seats 239 and permitting the spraying materials A' and B to fiow past the needle valves 2 to the respective nozzles 205 and 205' through the passageways 239. One spraying material only is delivered to the atomizing chamber of each nozzle from the respective passageways 239 through the respective passageways 210. In the atomizing'cham'bers the air under pressure mixes with and atomizes the particular spraying material. The atomized spray from each nozzle is ejected therefrom and converges to mix intimately with the spray from th other nozzle on or just before reaching the surface being sprayed.

When the trigger 216' is released, the air valve 2 and the flat valves 243 simultaneously cut off the fluid pressure and the supply of spraying materials.

If desired, this modified form of spraying device can be connected with the valve block and reservoir I30. Hoses or tubes 235 and 236 are connected to the respective nipples 41 and 42 of said block and hose I36 is connected to a nipple which can be attached to the barrel 202 and leading to passageway 338 therein connecting with passageway 211. Operation when the trig er H6 is now pulled is the same as the operation of the device of Fig. 4. The clean out blast from residual gas in the reservoir drives off residual spraying fluid from the two nozzles 205 and 205'. The use of the valve block and air reservoir with this latter device is optional. When not used, passageway 338 is closed off by a removable plug 339.

Since the needle valves 24! are ndividually controllable, the relative percentages of spraying materials A and B can -be individually regulated to anything desired by the operator.

It is to be understood of course that the deasaaaav vices may be modified as to details of construction without departing from the spirit of the invention and that modifications are contemplated within the scope of the appended claims.

What is claimed is;

1. In spraying apparatus, a spraying device having a nozzle, means for permitting passage of-spraying material to said nozzle, means for atomizing said-material at said nozzle including a gas passageway in one part of said device, a gas distributing chamber connected with said passageway and gas passageways leading from said chamber to said nozzle, valve means for controlling the entrance of gas into said chamber and means associated with said device and connected to said last named gas passageway for cutting off the said spraying material to said necting said cut-ofl'valve in the material supply to said device.

6. A spraying device having a nozzle, means for permitting passage of spraying material to said nozzle, means for regulating the quantity of spraying material passing to said nozzle, valve means for closing of! the passage 01' spraying material to said nozzle, means for atomizing said material at said nozzle including -a gas passageway in one part of said device, a gas distributing chamber connected with said passageway, and a gas passageway leading from said chamber to said nozzle, valve means for controlling the ennozzle prior to cessation of flow, of gas thereto,

said last named means comprising a gas reservoir and valve cut-off means for said spraying material responsive to pressure of gas in said reservoir.

2. In spraying apparatusa spraying device having nozzles thereon adapted to emit converging sprays, means for permitting passage of a different spraying material to-each nozzle, means for atomizing said different materials at each nozzle, including a gas passageway in one part of said device, a gas distributing chamber connected with said passageway and gas passageways leading from said chamber to said nozzles. valve means for controlling the entrance of gas into said chamber, and means associated with said device and connected to one of said last named gas passageways for cutting off the supply of said spraying materials to said nozzles prior to cessation of flow of gas thereto, said last named means comprising a gas reservoir and valve cutoil means for said spraying materials responsive to pressure of gas in said reservoir. I 3. In spraying apparatus having means to supply gas under pressure and spraying material to an atomizing nozzle, means to cut-off the supply of spraying material prior to cessation of gas flow through the said nozzle whereby residual spraying material on said nozzle is removed by gas after cut-off of said material, said last-named means including a gas reservoir, and a cut-oil valve for said material operated by pressure of gas in said reservoir.

4. In spraying apparatus having means to supply gas under pressure and spraying material to an atomizing nozzle, means to cut-off the supply of spraying material prior to cessation of gas flow through the said nozzle whereby residual spraying material on said nozzle is removed by gas after cut-oil of said material, said last-named means including a gas reservoir, and a cut-oil valve for said material operated by pressure of gas in said reservoir, and a piston connected with said valve and operated by pressure of gas in said reservoir.

5. In spraying apparatus having means to supply gas under pressure and spraying material to an atomizing nozzle, means to cut-off the supply of spraying material prior to cessation of gas flow through the said nozzle whereby residual spraying material on said nozzle is removed by gas after cut-off of said material, said last-named means including agas reservoir, and a cut-ofl valve for said material operated by pressure of gas in said reservoir, a piston connected with said valve and operated by pressure of gas in said reservoir, means for connecting said reservoir to the gas supply of said device and means for contrance of said gasto said chamber and means for simultaneously operating said two valve means to open position, and means associated with said device and responsive to gas pressurefor cutting oi! the supply ct said spraying material to said spraying device prior to the cessation of flow of gas to said nozzle.

7. In a spraying device having a nozzle, means for permitting passage of spraying material to said nozzle, means for regulating the quantity of spraying material passing to said nozzle, valve means for closing on the passage of spraying material to said nozzle, means for atomizing said material at said nozzle'including gas passageways leading to the nozzle, valve means for controlling .the entrance of gas to said passageways, means for simultaneously operating said two valve means to open position, and means associated with said device and responsive to gas pressure for cutting oil the supply of said spraying material to said spraying device prior to the cessation of flow of gas to said nozzle.

8. In a spraying device having nozzles thereon adapted to emit converging sprays, means for permitting passage of a diflerent spraying material to each nozzle, means for individually regulating the quantity of spraying material passing to each nozzle, valve means for closing ofl the passage of spraying materials to said nozzles, means for atomizing said materials at said nozzles including a gas passageway in one part of said device, a gas distributing chamber connected with said passageway and gas passageways leading. from said chamber to said nozzles, valve means for controlling the entrance of gas to said chamber, means for simultaneously operating both of said valve means to open position, and

said nozzle, a combination valve device including an adjustable needle valve for regulating the quantity of spraying material passing to said nozzle, and a second valve surrounding said needle valve for closing of! the passage of spraying material to said nozzle, means for atomizing said material at said nozzle including a gas passageway in'one part or said device, a gas distributing chamber connected with said passageway and gas passageways leading from said chamber to said nozzle, a valve for controlling the entrance of gas to said chamber, trigger operated means for simultaneously operating said last-named valve and said second valve to open position, and means associated with said device and responsive to gas pressure for cutting oil the supply 01 said spraying material to said spraying device prior to the cessation of flow of gas to said nozzle.

10. In a spraying device having nomles thereon adapted to emit converging sprays, means for permitting passage of a diilerent spraying material to each nozzle, combination valve devices comprising closure valves for closing of! the passages of spraying material to each nozzle and a needle valve associated with each closure valve and movable therewith, adjustable means for limiting the movement of each 01' said combination valve devices in one direction to individually regulate the quantity of spraying material passing to each nozzle, means for atomizing said materials at said nozzles including a gas passageway in one part of said device, a gas distributing chamber connected with said passageway and gas passageways leading from said chamber to said nozzles, a valve for controlling the entrance of gas to said chamber, means for simultaneously operating said lastnamed valve an said combination valve devices to open position, a swingably mounted connection between said operating means and said combination valve devices to permit a diflerent degree of movement of each valve device, and means associated with said device and responsive to gas pressure for cutting oil! the supply of said spraying material to said spraying device prior to the cessation oi flow of gas to said nozzles.

AUSTIN H. DOWNS. 

